I just installed some new mediocre shocks from autozone on a beat up 01 dually. After installation, I notice a clunk felt through the drivers side floor pan. Not only that, but the sound and feeling that it makes is quite noticeable. More than likely, it was occuring before the new shocks but possibly not. The shocks are mounted securely as far as I can tell. Is this a symptom of control arm bushing failure? How is the best way to check them and are auto parts replacements any good? Do any other joints come to mind that could be the same symptoms? Thanks.